Barron, JT
1992
Distributed Combustion Effects on Acoustic Growth Rates in a Modified Rijke Burner
Barron, J.T. and Queiroz, M.
Heat Transfer in Fire and Combustion Systems, 199:183-188, 1992. Funded by Air Force Office of Scientific Research and ACERC.
The effects of distributed combustion on acoustic growth rates in a modified Rijke burner has been investigated. Three different particle types were used (25 and 43-µm aluminum, 7-µm zirconium carbide and 10- and 43-µm aluminum oxide) at mass loadings between 0% and 10%. The results indicate that the degree of acoustic driving or damping is a function of frequency of oscillation and the type, size and concentration of particles. Acoustic driving was produced by 25- and 43-µm aluminum, and 7-µm zirconium carbide particles. The greatest amount of driving was produced by the 25-µm zirconium carbide particles. The effects of distributed combustion and particle damping were also found to be strongly dependent on frequency. Aluminum oxide particles at low concentrations (<=2%) caused acoustic driving most probably because of flame catalytic effects. At high concentrations, the acoustic oscillations were damped because of viscous damping effects.
Barron, JT
1992
Distributed Combustion Effects on Acoustic Growth Rates in a Modified Rijke Burner
Barron, J.T. and Queiroz, M.
Heat Transfer in Fire and Combustion Systems, 199:183-188, 1992. Funded by Air Force Office of Scientific Research and ACERC.
The effects of distributed combustion on acoustic growth rates in a modified Rijke burner has been investigated. Three different particle types were used (25 and 43-µm aluminum, 7-µm zirconium carbide and 10- and 43-µm aluminum oxide) at mass loadings between 0% and 10%. The results indicate that the degree of acoustic driving or damping is a function of frequency of oscillation and the type, size and concentration of particles. Acoustic driving was produced by 25- and 43-µm aluminum, and 7-µm zirconium carbide particles. The greatest amount of driving was produced by the 25-µm zirconium carbide particles. The effects of distributed combustion and particle damping were also found to be strongly dependent on frequency. Aluminum oxide particles at low concentrations (<=2%) caused acoustic driving most probably because of flame catalytic effects. At high concentrations, the acoustic oscillations were damped because of viscous damping effects.